Duplex S31803 Spool exporter in Spain
Duplex S31803 Spool exporter in Spain offers high-quality duplex stainless steel spools designed to meet the demands of various industrial sectors. These spools, made from the S31803 grade, provide excellent corrosion resistance and mechanical strength, making them ideal for use in harsh environments. The duplex stainless steel combines the best properties of austenitic and ferritic steels, ensuring durability and longevity in critical applications.
The duplex S31803 material is characterized by its balanced microstructure, which enhances resistance to stress corrosion cracking and improves weldability. This makes it particularly suitable for fabrication into spools that must withstand aggressive chemical exposure and fluctuating temperatures. Typical specifications include a chromium content of 22-23%, nickel at 4.5-6.5%, and molybdenum around 3%, delivering superior performance compared to standard stainless steel grades.
These spools are extensively used in the oil and gas industry, chemical processing plants, and marine engineering projects. Their robust construction supports the transport and management of corrosive fluids and gases, ensuring safety and efficiency. Exported products are carefully manufactured to comply with international standards such as ASTM A182 and EN 10222-5, providing confidence to global buyers in terms of quality and traceability.
Spain’s strategic location and advanced logistics infrastructure facilitate efficient export operations, allowing prompt delivery of duplex stainless steel spools worldwide. Export readiness is further enhanced by rigorous quality control measures, including dimensional accuracy, surface finish inspections, and comprehensive material certifications. Industrial buyers can rely on these spools for reliable performance in demanding environments, backed by professional export services.
Lead Time
2–7 weeks depending on size
Delivery Terms
FOB, CIF, DDP
Shipping Modes
Sea / Air / Express
Why Duplex S31803 Spool exporter in Spain Are Preferred by Global Buyers
- ✔ Factory Pricing: Direct manufacturer rates with bulk stock
- ✔ Certified Quality: ISO & 3rd-party tested, EN 10204 certified
- ✔ Export-Ready: Sea-worthy packaging for on-time delivery
- ✔ Fast RFQs: Quick quotes for custom sizes & quantities
- ✔ Traceability: 100% heat number tracking from raw material to finished product
Trusted by industries like oil & gas, petrochemicals, power, marine, and heavy engineering.
- Manufacturing Capacity: 500 MT / Month
- Export Experience: 15+ Years
- Countries Served: 50+
- Annual Export Volume: 5,500 MT
Table of Contents
- 1. What is Duplex S31803 Spool exporter in Spain
- 2. How to Choose the Right Manufacturer
- 3.Comparison of Duplex S31803 Spool exporter in Spain
- 4. Why Global Buyers Source from Ragnar Metals and Tubes
- 5. Features
- 6. Technical Overview
- 7. Specifications
- 8. Available Grades
- 9. Available Sizes
- 10. Chemical Properties
- 11. Mechanical Properties
- 12. Physical & Thermal Properties
- 13. Electrical Resistivity
- 14. Equivalent Grades
- 15. Manufacturing Process & Heat Treatment
- 16. Various Types
- 17. Applications & Uses
- 18. Industries We Serve
- 19. Latest Price List
- 20. MOQ & Payment Terms
- 21. Export Packaging & Shipping
- 22. Cities We Supply in India
- 23. Countries We Export Worldwide
- 24. Our Certifications
- 25. Quality Inspection & Testing
- 26. Our Other Product Types
- 27. People Also Search For
- 28. Frequently Asked Questions
- 29. About Ragnar Metals and Tubes
How to Choose the Right Duplex S31803 Spool exporter in Spain
India is home to hundreds of manufacturers ranging from small job shops to large ISO-certified exporters. International and domestic buyers typically evaluate manufacturers based on quality compliance, production capacity, export experience, and pricing transparency.
- Certification & international standards (ASME, ASTM, EN)
- Manufacturing capability vs trading activity
- Export documentation & inspection support
- Stock availability & lead time reliability
- Past supply experience in oil & gas, EPC & heavy industries
Comparison Factors Among Duplex S31803 Spool exporter in Spain
| Evaluation Factor | Small Local Suppliers | Trading Companies | ISO-Certified Manufacturers |
|---|---|---|---|
| Manufacturing Control | Limited | None | Full in-house / audited partners |
| International Standards | Basic | Depends on source | ASME / ASTM / EN |
| Inspection & MTCs | Limited | Inconsistent | EN 10204 3.1 / 3.2 |
| Export Experience | Low | Medium | 50+ countries |
| Risk for EPC Projects | High | Medium | Low |
International buyers typically prefer ISO-certified manufacturers for large-scale or critical applications due to better quality control, documentation, and lower project risk.
Why Global Buyers Choose Ragnar Metals and Tubes
Ragnar Metals and Tubes is a trusted ISO 9001:2015 certified manufacturer and global exporter of ferro alloys and metal products, supplying consistent, high-quality materials to customers across USA, UK, Europe, Middle East, Africa, and Asia-Pacific. Our focus on quality assurance, cost efficiency, and on-time delivery makes us a preferred sourcing partner for international buyers.
| Key Advantage | Buyer Benefit |
|---|---|
| ISO 9001:2015 Certified Manufacturing | Consistent quality with documented QA systems and process control |
| ASME / ASTM / EN Compliant Products | Globally accepted standards with EN 10204 3.1 / 3.2 MTCs |
| Lower Manufacturing & Sourcing Costs | Save up to 15–20% compared to European suppliers |
| Favorable Exchange Rate Advantage | Reduced landed cost for international importers |
| In-House Testing & Inspection Facilities | Strict chemical, mechanical & dimensional quality checks |
| Bulk Stock & High Production Capacity | Fast order fulfillment and stable supply for large projects |
| Custom Sizes & Drawing-Based Manufacturing | Products manufactured exactly to buyer specifications |
| Export-Grade Packaging & Global Logistics | Sea-worthy packing, palletization & worldwide shipping support |
| Faster Global Shipping Routes | Optimized logistics for Middle East, Africa & Southeast Asia |
| Technical & After-Sales Support | Project assistance, documentation & responsive RFQ handling |
| Trusted by Global Steel & EPC Companies | Proven export experience across 50+ countries |
Features of Duplex S31803 Spool
- ✔ Excellent corrosion resistance in a wide range of environments
- ✔ High strength and durability, suitable for high-pressure applications
- ✔ Good weldability and formability for various fabrication processes
- ✔ Enhanced pitting resistance due to the balanced alloying elements
- ✔ Cost-effective solution compared to other high-performance materials
- ✔ Lightweight design reduces overall system weight without compromising integrity
Technical Overview of Duplex S31803
| Product | Composition | Usage | Standards |
|---|---|---|---|
| Duplex S31803 Spool | 22% Cr, 5% Ni, 3% Mo, balance Fe | Oil and gas pipelines, chemical processing | ASTM A790, ASME SA790 |
| Duplex S31803 Flange | 22% Cr, 5% Ni, 3% Mo, balance Fe | Marine applications, pressure vessels | ASTM A182, ASME SA182 |
| Duplex S31803 Fitting | 22% Cr, 5% Ni, 3% Mo, balance Fe | Structural applications, heat exchangers | ASTM A403, ASME SA403 |
Specifications Table
| Material | Duplex Stainless Steel S31803 |
|---|---|
| Grades | S31803 |
| Standard | ASTM A790 |
| Size Range | 1/2" to 24" (DN15 to DN600) |
| Length | Up to 12 meters |
| Form | Spool |
Available Grades Table
| Product | Composition | Applications |
|---|---|---|
| Duplex S31803 | 22% Cr, 5% Ni, 3.2% Mo | Oil and gas, chemical processing, marine applications |
| Duplex S32205 | 22% Cr, 5% Ni, 3.2% Mo | Pulp and paper, pressure vessels, heat exchangers |
| Duplex S32750 | 25% Cr, 7% Ni, 4% Mo | Desalination plants, offshore structures, flue gas cleaning |
| Duplex S31803L | 22% Cr, 5% Ni, 3.2% Mo | Food processing, pharmaceutical industry, water treatment |
| Duplex S32003 | 24% Cr, 4% Ni, 3.5% Mo | Heat exchangers, pressure vessels, wastewater treatment |
Available Sizes of Duplex S31803 (MM)
| Size (MM) | Size (MM) |
|---|---|
| 25 | 50 |
| 32 | 63 |
| 40 | 76 |
| 50 | 89 |
| 63 | 102 |
| 76 | 114 |
| 89 | 127 |
| 102 | 140 |
| 114 | 160 |
| 127 | 200 |
Chemical Properties of Duplex S31803
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.03 max |
| Manganese (Mn) | 2.00 max |
| Phosphorus (P) | 0.03 max |
| Sulfur (S) | 0.02 max |
| Silicon (Si) | 1.00 max |
| Chromium (Cr) | 22.0 - 23.0 |
| Nickel (Ni) | 4.5 - 6.5 |
| Molybdenum (Mo) | 3.0 - 3.5 |
Mechanical Properties of Duplex S31803
| Property | Value |
|---|---|
| Tensile Strength | 620 - 800 MPa |
| Yield Strength | 450 - 600 MPa |
| Elongation | 25% (min) |
| Hardness | 250 - 300 HB |
| Modulus of Elasticity | 200 GPa |
Duplex S31803 – Physical & Thermal Properties
Density of Duplex S31803
| Property | Metric | Imperial |
|---|---|---|
| Density | 7.8 g/cm³ | 0.28 lb/in³ |
Melting Point of Duplex S31803
| Property | Metric | Imperial |
|---|---|---|
| Melting Point | 1400 - 1450 °C | 2552 - 2642 °F |
Specific Heat of Duplex S31803
| Specific Heat of Duplex S31803 | ||
|---|---|---|
| Specific Heat (J/kg·K) | Temperature Range (°C) | Condition |
| 500 | 20 - 100 | Room Temperature |
| 480 | 100 - 400 | Heating |
| 460 | 400 - 800 | High Temperature |
Electrical Resistivity of Duplex S31803
| Electrical Resistivity | ||
|---|---|---|
| Value (µΩ·m) | Temperature (°C) | Treatment or Condition |
| 0.75 | 20 | As Hot Rolled |
| 0.80 | 100 | |
| 0.85 | 200 | |
| 0.90 | 300 | |
| 0.95 | 400 | |
Equivalent of Duplex S31803
| Standard | Werkstoff Nr. | UNS |
|---|---|---|
| ASTM A240 | 1.4462 | S31803 |
| EN 10088-1 | X2CrNiMoN22-5-3 | S31803 |
Manufacturing Process & Heat Treatment of Duplex S31803
Annealing
The annealing process for Duplex S31803 involves heating the material to a temperature range of 1020°C to 1100°C, followed by a controlled cooling process. This treatment helps to relieve internal stresses, improve ductility, and refine the microstructure, ensuring optimal performance in various applications.
Forging
Forging of Duplex S31803 is conducted at elevated temperatures between 1050°C and 1200°C. The process enhances the mechanical properties of the steel by refining the grain structure and ensuring uniform distribution of phases. This results in improved strength and toughness, making it suitable for demanding environments.
Hardening & Tempering
| Process | Temperature Range (°C) | Quenching Medium | Purpose |
|---|---|---|---|
| Hardening | 1050 - 1100 | Oil | To increase hardness and strength |
| Tempering | 600 - 800 | Air | To reduce brittleness and improve toughness |
| Stabilization | 700 - 800 | Air | To enhance resistance to stress corrosion cracking |
The combination of these manufacturing and heat treatment processes ensures that Duplex S31803 spools exhibit excellent mechanical properties, corrosion resistance, and durability, making them ideal for a variety of industrial applications.
Various Types
Duplex S31803 Spool - Standard
- Diameter: 100mm - 500mm
- Condition: Hot Finished
- Applications: Oil and Gas, Chemical Processing
Duplex S31803 Spool - Custom
- Diameter: 50mm - 600mm
- Condition: Cold Drawn
- Applications: Marine, Pulp and Paper
Duplex S31803 Spool - High Strength
- Diameter: 80mm - 400mm
- Condition: Heat Treated
- Applications: Aerospace, Structural Applications
Duplex S31803 Spool - Corrosion Resistant
- Diameter: 150mm - 700mm
- Condition: Passivated
- Applications: Chemical Storage, Desalination Plants
Applications & Uses
- Oil & Gas Industry: Pipelines, process piping, and high-pressure fluid handling systems.
- Petrochemical & Refineries: Reactors, heat exchangers, and chemical processing units.
- Water Treatment Plants: Filtration systems, storage tanks, and corrosion-resistant piping.
- Pharmaceutical Industry: Hygienic piping, sanitary fittings, and cleanroom equipment.
- Food & Beverage: Processing lines, storage vessels, and contamination-free pipelines.
- Automobile & Engineering: Exhaust systems, structural parts, and precision components.
- Power & Energy Sector: Boilers, condensers, and turbine piping systems.
- Marine & Offshore: Shipbuilding, offshore platforms, and coastal infrastructure.
- Construction & Infrastructure: Structural frameworks, bridges, and industrial buildings.
Industries We Serve
Our stainless steel, alloy steel, and high-performance metal products are widely used across the following industries:
Latest Price List of Duplex S31803
| Material Grade | Thickness | Price (USD / Kg) | Price (INR / Kg) |
|---|---|---|---|
| Duplex S31803 | 3 mm | $2.50 – $3.00 | ₹207 – ₹248 |
| Duplex S31803 | 6 mm | $2.40 – $2.90 | ₹199 – ₹241 |
| Duplex S31803 | 10 mm | $2.30 – $2.80 | ₹192 – ₹233 |
Note: Prices are indicative and may vary based on size, quantity, raw material cost, and delivery location. Contact us for the latest quotation for Duplex S31803.
MOQ & Payment Terms
Minimum Order Quantity: 25–100 Kg depending on part size and grade.
Payment Terms: Depending On Grade and Quantity Size
Export Packaging & Shipping
- Seaworthy, fumigated wooden crates with waterproof inner lining
- Palletised packing with clear shipping marks and heat number identification
- Container stuffing supervision with loading photographs available on request
We Exported to 50+ Countries Worldwide
| Global Export Destinations | |||||
|---|---|---|---|---|---|
| United States | Canada | Mexico | United Kingdom | Germany | Netherlands |
| Italy | Spain | South Africa | Australia | India | Korea |
| United Arab Emirates | Saudi Arabia | Qatar | Kuwait | Oman | Bahrain |
| Singapore | Malaysia | Indonesia | Dubai | Riyadh | Dammam |
Our Certifications
We are a certified manufacturer and exporter, committed to strict quality control and international compliance standards. Below are our key certifications.
GST Registered
ISO 9001:2015
ISO 1002:2018
Udyam MSME Registration
Testing Process & Quality Assurance – Ragnar Metals & Tubes
At Ragnar Metals & Tubes, our testing process ensures the safety, reliability, and performance of stainless steel and alloy steel products supplied for global industrial and infrastructure projects. Each batch is verified from raw material selection to final dispatch under internationally recognized standards including ASTM, ASME, ISO, DIN, and EN.
Detects internal flaws using high-frequency sound waves
Measures yield strength, elongation, and material durability
Evaluates toughness under low-temperature and high-stress conditions
Ensures smoothness, coating quality, and visual compliance
Enhances hardness, strength, and corrosion resistance
Measures resistance to deformation and wear
Documentation & Global Compliance
- ✔ EN 10204 3.1 / 3.2 Mill Test Certificates (MTC)
- ✔ Batch-wise quality traceability and inspection records
- ✔ Third-party inspection by SGS, TUV, Bureau Veritas & Lloyd’s
- ✔ Export documentation support for customs and international shipping
Supporting supply for oil & gas, petrochemical, power generation, marine, infrastructure, and heavy engineering industries worldwide.
Related Products
Explore our full range of stainless steel and alloy steel products including pipes, tubes, fittings, flanges, sheets, plates, spools, fasteners, round bars, and special grades manufactured for industrial, infrastructure, and global export applications.
People Also Search For
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Frequently Asked Questions
About Ragnar Metals & Tubes
- ✔ Leading manufacturer, stockist, and exporter of stainless steel and alloy steel products for industrial and infrastructure projects
- ✔ ISO 9001:2015 certified quality management system ensuring consistent product reliability and compliance
- ✔ Specialized in precision pipes, tubes, fittings, flanges, sheets, plates, fasteners, and round bars
- ✔ Modern processing and testing facilities with advanced manufacturing and inspection equipment
- ✔ Custom-engineered solutions based on client drawings and technical specifications
- ✔ Full material traceability with EN 10204 3.1 / 3.2 mill test certification
- ✔ Compliance with ASTM, ASME, DIN, EN, and ISO international standards
- ✔ Trusted global supplier supporting oil & gas, petrochemical, power, marine, and heavy engineering industries